Biometric sensor chip having distributed sensor and control circuitry
First Claim
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1. A sensor, comprising:
- a sensor array formed on a first side of a substrate, the sensor array comprising;
a first plurality of electrical traces defining a plurality of rows; and
a second plurality of electrical traces defining a plurality of columns, the plurality of columns intersecting the plurality of rows, thereby defining a plurality of intersections; and
a sensing element formed at each of the plurality of intersections;
at least one circuit operative to communicate with the sensor array formed on a second opposing side of the substrate; and
a plurality of vias extending through the substrate to electrically connect the sensor array to the at least one circuit, wherein each of the plurality of vias is formed at a unique end of one of the plurality of rows and the plurality of columns.
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Abstract
A sensor includes a sensor array formed on a first side of a substrate and at least one circuit operative to communicate with the sensor array formed on a second side of the substrate. At least one via extends through the substrate to electrically connect the sensor array to the at least one circuit. Placing the at least one circuit on the second side of the substrate allows the sensor array to occupy substantially all of the first side of the substrate.
114 Citations
13 Claims
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1. A sensor, comprising:
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a sensor array formed on a first side of a substrate, the sensor array comprising; a first plurality of electrical traces defining a plurality of rows; and a second plurality of electrical traces defining a plurality of columns, the plurality of columns intersecting the plurality of rows, thereby defining a plurality of intersections; and a sensing element formed at each of the plurality of intersections; at least one circuit operative to communicate with the sensor array formed on a second opposing side of the substrate; and a plurality of vias extending through the substrate to electrically connect the sensor array to the at least one circuit, wherein each of the plurality of vias is formed at a unique end of one of the plurality of rows and the plurality of columns. - View Dependent Claims (2)
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3. A sensor, comprising:
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a sensor array formed on a first side of a substrate, the sensor array comprising; a first plurality of electrical traces defining a plurality of rows; and a second plurality of electrical traces defining a plurality of columns, the plurality of columns intersecting the plurality of rows, thereby defining a plurality of intersections; and a sensing element formed at each of the plurality of intersections; at least one circuit operative to communicate with the sensor array formed on a second opposing side of the substrate; and at least one via extending through the substrate to electrically connect the sensor array to the at least one circuit, wherein the at least one via underlies one trace chosen from the first and second plurality of traces.
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4. A sensor, comprising:
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a sensor array formed on a first side of a substrate, the sensor array comprising; a first plurality of electrical traces defining a plurality of rows; and a second plurality of electrical traces defining a plurality of columns, the plurality of columns intersecting the plurality of rows, thereby defining a plurality of intersections; and a sensing element formed at each of the plurality of intersections; at least one circuit operative to communicate with the sensor array formed on a second opposing side of the substrate; and a plurality of vias extending through the substrate to electrically connect the sensor array to the at least one circuit, wherein each of the plurality of vias underlies a trace chosen from the first or second plurality of traces. - View Dependent Claims (5, 6, 7, 8)
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9. An electronic device, comprising:
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a cover glass; and a sensor positioned below the cover glass, the sensor comprising; a sensor array formed on a first side of a substrate, wherein the sensor array comprises; a first plurality of electrical traces defining a plurality of rows; and a second plurality of electrical traces defining a plurality of columns, the plurality of columns intersecting the plurality of rows, thereby defining a plurality of intersections; and a sensing element formed at each of the plurality of intersections; at least one circuit operative to communicate with the sensor array formed on a second opposing side of the substrate; and a plurality of vias extending through the substrate to electrically connect the sensor array to the at least one circuit;
whereineach of the plurality of vias underlies an electrical trace chosen from the first or the second plurality of electrical traces;
oreach of the plurality of vias is formed at a unique end of one of the plurality of rows and the plurality of columns. - View Dependent Claims (10, 11, 12, 13)
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Specification